magento-test/app/code/Magento/Customer/Test/Mftf/ActionGroup/StorefrontCustomerChangeEmailActionGroup.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->

<actionGroups xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/actionGroupSchema.xsd">
    <actionGroup name="StorefrontCustomerChangeEmailActionGroup">
        <annotations>
            <description>Change the Customer Email Address for a Customer Account via the Storefront Customer Dashboard page.</description>
        </annotations>
        <arguments>
            <argument name="email" type="string"/>
            <argument name="password" type="string"/>
        </arguments>
        
        <conditionalClick selector="{{StorefrontCustomerSidebarSection.sidebarTab('Account Information')}}" dependentSelector="{{StorefrontCustomerSidebarSection.sidebarTab('Account Information')}}" visible="true" stepKey="openAccountInfoTab"/>
        <waitForPageLoad stepKey="waitForAccountInfoTabOpened"/>
        <checkOption selector="{{StorefrontCustomerAccountInformationSection.changeEmail}}" stepKey="clickChangeEmailCheckbox"/>
        <fillField selector="{{StorefrontCustomerAccountInformationSection.email}}" userInput="{{email}}" stepKey="fillEmail"/>
        <fillField selector="{{StorefrontCustomerAccountInformationSection.currentPassword}}" userInput="{{password}}" stepKey="fillCurrentPassword"/>
        <click selector="{{StorefrontCustomerAccountInformationSection.saveButton}}" stepKey="saveChange"/>
        <waitForPageLoad stepKey="waitForPageLoaded"/>
    </actionGroup>
</actionGroups>